<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
  <div style="width: 200px;padding: 10px">
      <center>
          <div>目前状态：<span id="status">刷课中</span></div>
          <br>
          <button id="on">打开刷课</button>
          <button id="off">关闭刷课</button>
          <div>刷新页面后生效</div>
      </center>

  </div>
</body>
<script src="popup.js"></script>
</html>